Periodic Testing; Preparing The Valve For Service Work - Samson 3276-D Mounting And Operating Instructions

Servicing
NOTICE
!
Risk of actuator damage due to excessively
high or low tightening torques.
Observe the specified torques when tighten-
ing actuator components. Excessive tighten-
ing torques lead to parts wearing out more
quickly. Parts that are not tightened far
enough may loosen.
Î Observe the specified tightening torques.
NOTICE
!
Risk of actuator damage due to the use of
unsuitable tools.
Î Only use tools approved by SAMSON.
NOTICE
!
Risk of actuator damage due to the use of
unsuitable lubricants.
Î Only use lubricants approved by
SAMSON.
Note
− The product warranty becomes void if
service or repair work not described in
these instructions is performed without
prior agreement by SAMSON's After-sales
Service.
− Only use original spare parts by
SAMSON, which comply with the original
specifications.
8-2

8.1 Periodic testing

Depending on the operating conditions,
check the actuator at certain intervals to pre-
vent possible failure before it can occur.
Plant operators are responsible for drawing
up an inspection and test plan.
Tip
Our after-sales service can support you in
drawing up an inspection and test plan for
your plant.
8.2 Preparing the valve for
service work
1. Lay out the necessary material and tools
to have them ready for the intended
work.
2. Put the actuator out of operation (see the
'Decommissioning' section).
3. Remove the actuator from the valve (see
the 'Removal' section).
4. Relieve the compression from the pre-
loaded spring. See 'Relieving the spring
compression in the actuator' in the 'Re-
moval' section.
5. Unthread and remove the nuts (917) and
bolts (916) (including the washers) from
around the diaphragm case. Keep the
parts in a safe place for later use.
The following service work can be per-
formed after preparation is completed:
− Replace the diaphragm (see sec-
tion 8.4.1)
EB 8318 EN